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AIM:To observe the effect of wearing glasses with full correction or under-correction on the development of juvenile myopia.<p>METHODS:This study included 132 cases(264 eyes )from January 2008 to September 2012 who were collected from our clinic.They were divided into 2 groups, full correction and under-correction. Students in group 1 wore glasses with full correction, students in group 2 wore glasses with under-correction 0.25D to 0.5D lower than normal. Reexamination was done every 6mo.After 12mo, refractions were checked, the development of myopia was compared.<p>RESULTS:There were no statistically significant differences between two groups after 6mo(<i>P</i>=0.0693); however, there were significant differences after 12mo(<i>P</i>=0.0013).<p>CONCLUSION:The development of myopia is slow if students often wear glasses with full correction.